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Italian Journal of Pure and Applied Mathematics最新文献

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Shallow Water 1D Model for Pollution River Study 污染河流研究的浅水一维模型
IF 0.2
Italian Journal of Pure and Applied Mathematics Pub Date : 2017-04-15 DOI: 10.11648/J.PAMJ.20170602.13
A. C. K. Jotsa, V. Pennati, A. Guardo, M. Morselli
{"title":"Shallow Water 1D Model for Pollution River Study","authors":"A. C. K. Jotsa, V. Pennati, A. Guardo, M. Morselli","doi":"10.11648/J.PAMJ.20170602.13","DOIUrl":"https://doi.org/10.11648/J.PAMJ.20170602.13","url":null,"abstract":"In this paper a finite element 1D model for shallow water flows with distribution of chemical substances is presented. The deterministic model, based on unsteady flow and convection-diffusion-decay of the pollutants, allows for evaluating in any point of the space-time domain the concentration values of the chemical compounds. The numerical approach followed is computationally cost-effectiveness respect both the stability and the accuracy, and by means of it is possible to foresee the evolution of the concentrations.","PeriodicalId":46057,"journal":{"name":"Italian Journal of Pure and Applied Mathematics","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2017-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75845167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Generalization of Kalmar’s Proof of Deducibility in Two Valued Propositional Logic into Many Valued Logic 二值命题逻辑中Kalmar的可演绎性证明推广到多值逻辑
IF 0.2
Italian Journal of Pure and Applied Mathematics Pub Date : 2017-03-22 DOI: 10.11648/J.PAMJ.20170602.12
Chubaryan Anahit, Khamisyan Artur
{"title":"Generalization of Kalmar’s Proof of Deducibility in Two Valued Propositional Logic into Many Valued Logic","authors":"Chubaryan Anahit, Khamisyan Artur","doi":"10.11648/J.PAMJ.20170602.12","DOIUrl":"https://doi.org/10.11648/J.PAMJ.20170602.12","url":null,"abstract":"This paper focuses on the problem of constructing of some standard Hilbert style proof systems for any version of many valued propositional logic. The generalization of Kalmar’s proof of deducibility for two valued tautologies inside classical propositional logic gives us a possibility to suggest some method for defining of two types axiomatic systems for any version of 3-valued logic, completeness of which is easy proved direct, without of loading into two valued logic. This method i) can be base for direct proving of completeness for all well-known axiomatic systems of k-valued (k≥3) logics and may be for fuzzy logic also, ii) can be base for constructing of new Hilbert-style axiomatic systems for all mentioned logics.","PeriodicalId":46057,"journal":{"name":"Italian Journal of Pure and Applied Mathematics","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2017-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83465317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Clones of Self-Dual and Self-K-Al Functions in K-valued Logic k值逻辑中自对偶和自k - al函数的克隆
IF 0.2
Italian Journal of Pure and Applied Mathematics Pub Date : 2017-03-11 DOI: 10.11648/J.PAMJ.20170602.11
M. Malkov
{"title":"Clones of Self-Dual and Self-K-Al Functions in K-valued Logic","authors":"M. Malkov","doi":"10.11648/J.PAMJ.20170602.11","DOIUrl":"https://doi.org/10.11648/J.PAMJ.20170602.11","url":null,"abstract":"We give a classification of dual functions, they are m-al functions. We call a function m-al with respect to an operator if the operator lives any function unchanged after m times of using the operator. And 2 ≤ m ≤ k. Functions with different m have very different properties. We give theoretical results for clones of self-dual (m = 2) and self- -al (m = k) functions in k -valued logic at k ≤ 3. And we give numerical results for clones of self-dual and self-3-al functions in 3-valued logic. In particular, the inclusion graphs of clones of self-dual and of self-3-al functions are not a lattice.","PeriodicalId":46057,"journal":{"name":"Italian Journal of Pure and Applied Mathematics","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2017-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82945965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Finding Energy of the Slant Helix Strip by Using Classic Energy Methods on Joachimsthal Theorem 基于Joachimsthal定理的经典能量方法求斜螺旋带的能量
IF 0.2
Italian Journal of Pure and Applied Mathematics Pub Date : 2017-03-06 DOI: 10.11648/j.pamj.s.2017060301.11
F. Kaya
{"title":"Finding Energy of the Slant Helix Strip by Using Classic Energy Methods on Joachimsthal Theorem","authors":"F. Kaya","doi":"10.11648/j.pamj.s.2017060301.11","DOIUrl":"https://doi.org/10.11648/j.pamj.s.2017060301.11","url":null,"abstract":"There are two forms of mechanical energy-potential energy and kinetic energy in physics. Potential energy E p is stored energy of position. The amount of kinetic energy E k possesed by a moving object is depent upon mass and speed. The total mechanical energy possesed by an object is the sum of its kinetic and potential energies. Now we calculate the mathematical physic on Joachimsthal Theorem. In this paper, we find the eneryg of two curves on different surfaces and slant helix strips by using classic energy formulaes in Euclidean Space E 3 .","PeriodicalId":46057,"journal":{"name":"Italian Journal of Pure and Applied Mathematics","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2017-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88372315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Cubic B-spline Collocation Method for One-Dimensional Heat Equation 一维热方程的三次b样条配点法
IF 0.2
Italian Journal of Pure and Applied Mathematics Pub Date : 2017-03-06 DOI: 10.11648/j.pamj.20170601.17
Mohamed H. Khabir, R. Farah
{"title":"Cubic B-spline Collocation Method for One-Dimensional Heat Equation","authors":"Mohamed H. Khabir, R. Farah","doi":"10.11648/j.pamj.20170601.17","DOIUrl":"https://doi.org/10.11648/j.pamj.20170601.17","url":null,"abstract":"In this paper we discuss cubic B-spline collocation method. We have given the derivation of the B-spline method in general. We have applied the method for solving one-dimensional heat equation and the numerical result have been compared with the exact solution.","PeriodicalId":46057,"journal":{"name":"Italian Journal of Pure and Applied Mathematics","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2017-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82179239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Some Structures of Hemirings 海菱的一些结构
IF 0.2
Italian Journal of Pure and Applied Mathematics Pub Date : 2017-03-01 DOI: 10.11648/J.PAMJ.20170601.16
Md. Yasin Ali, K. R. Chowdhury, A. Sultana, N. K. Mitra
{"title":"Some Structures of Hemirings","authors":"Md. Yasin Ali, K. R. Chowdhury, A. Sultana, N. K. Mitra","doi":"10.11648/J.PAMJ.20170601.16","DOIUrl":"https://doi.org/10.11648/J.PAMJ.20170601.16","url":null,"abstract":"Hemirings appear in a natural manner, in some applications to the theory of automata, the theory of formal languages, graph theory, design theory and combinatorial geometry. Recently, the notions of hemirings with special structures were introduced. But still now there are no complete structural properties of hemirings. In this paper we try to investigate some structures of hemirings. This is done by introducing some examples of hemirings.","PeriodicalId":46057,"journal":{"name":"Italian Journal of Pure and Applied Mathematics","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82077014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Determining Factors of Country Development and Nondevelopment 国家发展与不发展的决定因素
IF 0.2
Italian Journal of Pure and Applied Mathematics Pub Date : 2017-02-27 DOI: 10.11648/j.pamj.20170601.14
Onialisoa Mirana Rakotoarivelo, H. Ravelonirina
{"title":"Determining Factors of Country Development and Nondevelopment","authors":"Onialisoa Mirana Rakotoarivelo, H. Ravelonirina","doi":"10.11648/j.pamj.20170601.14","DOIUrl":"https://doi.org/10.11648/j.pamj.20170601.14","url":null,"abstract":"In this paper, we study the state of a country with the determining factors of the development-nondevelopment. For doing so, we have seen that they have indicators and sub-indicators. And after having calculated the weight and value of each determining factor, we created a new index to measure a country’s development.","PeriodicalId":46057,"journal":{"name":"Italian Journal of Pure and Applied Mathematics","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2017-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82478611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Mathematical Modelling of Impact of Education on Average Age at the First Marriage in Tanzania 坦桑尼亚教育对初婚平均年龄影响的数学模型
IF 0.2
Italian Journal of Pure and Applied Mathematics Pub Date : 2017-02-23 DOI: 10.11648/j.pamj.20170601.15
F. S. Seif, S. Khamis, John K. Mduma, E. Massawe
{"title":"Mathematical Modelling of Impact of Education on Average Age at the First Marriage in Tanzania","authors":"F. S. Seif, S. Khamis, John K. Mduma, E. Massawe","doi":"10.11648/j.pamj.20170601.15","DOIUrl":"https://doi.org/10.11648/j.pamj.20170601.15","url":null,"abstract":"This paper examines the impact of education on the average age at the first marriage to women in Tanzania. A mathematical model for the distribution of average age at the first marriage in Tanzania is established and the effect of education on the year at first marriage is estimated for the years 1999 and 2003/04. Both descriptive analysis and model estimate show that education level and education attainment have an impact on the average age at the first marriage. It is established that as one attains further studies, her age at first marriage is delayed. The model validation was presented graphically to illustrate the validity of the model where the proportion of ever married p ( a , x 1 , x 2 ) fitted very closely to the empirical data.","PeriodicalId":46057,"journal":{"name":"Italian Journal of Pure and Applied Mathematics","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2017-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88535626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Finite Closed Sets of Functions in Multi-valued Logic 多值逻辑中函数的有限闭集
IF 0.2
Italian Journal of Pure and Applied Mathematics Pub Date : 2017-02-20 DOI: 10.11648/J.PAMJ.20170601.13
M. Malkov
{"title":"Finite Closed Sets of Functions in Multi-valued Logic","authors":"M. Malkov","doi":"10.11648/J.PAMJ.20170601.13","DOIUrl":"https://doi.org/10.11648/J.PAMJ.20170601.13","url":null,"abstract":"The article is devoted to classification of close sets of functions in k-valued logic. We build the classification of finite closed sets. The sets contain only constants and unary functions since sets containing even a two-ary function are infinite. Formulas of the number of finite sets and minimal sets exist for all natural k. We find the numbers of closed sets containing the identity function f (x)=x or a constant for all k. We give the number of sets on levels of inclusions at k up to 10. The inclusion diagrams are present at k up to 5, at k=6 we give inclusion diagrams of sets containing only function f (x)=x and constant 0. We find isomorphic sets and use only one of the isomorphic sets to build the diagrams.","PeriodicalId":46057,"journal":{"name":"Italian Journal of Pure and Applied Mathematics","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2017-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81367752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Linear and Non-linear Feedback Control Strategies for a 4D Hyperchaotic System 四维超混沌系统的线性和非线性反馈控制策略
IF 0.2
Italian Journal of Pure and Applied Mathematics Pub Date : 2017-02-16 DOI: 10.11648/j.pamj.20170601.12
Maysoon M. Aziz, S. Al-Azzawi
{"title":"Linear and Non-linear Feedback Control Strategies for a 4D Hyperchaotic System","authors":"Maysoon M. Aziz, S. Al-Azzawi","doi":"10.11648/j.pamj.20170601.12","DOIUrl":"https://doi.org/10.11648/j.pamj.20170601.12","url":null,"abstract":"This paper investigates the stabilization of unstable equilibrium for a 4D hyperchaotic system. The linear, non-linear and speed feedback controls are used to suppress hyperchaos to this equilibrium. The Routh-Hurwitz theorem and Lyapunov's second methods are used to derive the conditions of the asymptotic stability of the controlled hyperchaotic system. Theoretical analysis, numerical simulation and illustrative examples are given to demonstrate the effectiveness of the proposed controllers.","PeriodicalId":46057,"journal":{"name":"Italian Journal of Pure and Applied Mathematics","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2017-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81836497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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